I cant seem to get art work that I have created to open in illustrator by double clicking. I have to either tell it to open with or to drag it to the program. Does anybody know the fix for this?
Normal file association problems, but since you didn't provide any system information, nobody can tell you exactly. Sounds like Windows, though. In that case eitehr Extras --> Folder Options or Organize --> Folder- & Search Options is your friend... Delete the AI file association, manually reinstate it the next time you double-click a file...
Select a file with the .ai extension. With the file selected, do a Get Info (Cmd-I) for that file. When the Info window opens, scroll down to the section that says Open with: and use the dropdown to select whatever Illustrator app you have installed. After selecting AI in the dropdown, click the Change All button. Close the Info window.